# CVE-2018-16530: Memory corruption in Forcepoint Email Security

> A stack-based buffer overflow in Forcepoint Email Security allows attackers to crash processes, causing denial of service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Apr 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m6q8-fqhp-5fpf

## What is CVE-2018-16530?

CVE-2018-16530 is a critical memory corruption vulnerability in Forcepoint Email Security, published on 9 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A stack-based buffer overflow in Forcepoint Email Security version 8.5 allows an attacker to craft malicious input and potentially crash a process creating a denial-of-service. While no known Remote Code Execution (RCE) vulnerabilities exist, as with all buffer overflows, the possibility of RCE cannot be completely ruled out. Data Execution Protection (DEP) is already enabled on the Email appliance as a risk mitigation.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2018-16530?

It affects 1 product.


Products: Forcepoint Email Security.

## How do I fix CVE-2018-16530?

No fix has been published for CVE-2018-16530 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16530 being exploited?

There is no known exploitation of CVE-2018-16530 in the wild and no public exploit code.

## Other vulnerabilities in Forcepoint Email Security

- [CVE-2019-6140](https://insights.sbomify.com/CVE-2019-6140/): Misconfiguration in Forcepoint Email Security (critical 9.8)
- [CVE-2018-16529](https://insights.sbomify.com/CVE-2018-16529/): Auth bypass in Forcepoint Email Security (critical 9.8)
- [CVE-2024-2166](https://insights.sbomify.com/CVE-2024-2166/): Cross-site scripting in Email Security (high 8.8)
- [CVE-2023-2080](https://insights.sbomify.com/CVE-2023-2080/): SQL injection in Cloud Security Gateway (CSG) (high 8.5)
- [CVE-2019-6142](https://insights.sbomify.com/CVE-2019-6142/): Cross-site scripting in Forcepoint Email Security (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16530 and fix it if it is affected.

What it is: CVE-2018-16530 is a critical memory corruption vulnerability in Forcepoint Email Security, published on 9 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-16530 in the wild and no public exploit code.

Affected product: Forcepoint Email Security. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2018-16530/ (Markdown: https://insights.sbomify.com/CVE-2018-16530/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16530
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16530
- OSV: https://osv.dev/vulnerability/CVE-2018-16530

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16530/
Summaries are generated and may contain mistakes; the official description above is the record.